Interface improvements WIP

Current progress:
![schermafbeelding 2014-11-01 om 19 24 17](https://cloud.githubusercontent.com/assets/1244416/4872805/5006064e-61f4-11e4-82d2-1644b22ce87a.png)

- [x] Removed contextmenu
- [x] Temporarily remove tab-pagination
- [ ] Reimplement pagination
- [ ] Fix tabs styling, bottom border shouldn't be visible.
- [ ] Simplify even more